The Dr. J CompDriver is the signature pedal of Jose de Castro. This pedal combines an overdrive and a compressor effect together in one convenient pedal. What's unique about it is it allows you to easily switch the position of the compressor (before or after! the overdrive) to get unique tones at a flick of switch. And of course you can simply turn it off and just have a reasonably priced boutique style OD pedal.